Pozzo del Merro
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| Pozzo del Merro | |
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| Location | Sant'Angelo Romano, Lazio, Italy |
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| Depth | c. 392 m |
Pozzo del Merro is a flooded sinkhole in the countryside northeast of Rome, Italy. Situated at the bottom of an 80 m conical pit, at 392 m (1,286 ft) it is the second deepest underwater vertical cave in the world. In 2000 two ROVs were sent to explore its depths; the first, the "Mercurio (Mercury)" reached its maximum operative depth of 210 m (690 ft) without reaching the bottom. The second ROV, "Hyball 300", reached 310 m (1,020 ft) without touching down either.[1] A third dive in 2002 with the more advanced "Prometeo" robot reached the bottom at 392 m (1,286 ft), but discovered a narrow passage continuing horizontally.[1]
The sinkhole, similar to the Zacatón cenote, was formed by volcanic activity eroding the carbonate rock.[2]
The sinkhole is part of the natural reserve Macchia di Gattaceca e Macchia del Barco (created in 1997).[3]
References
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- ^ a b Page Module:Citation/CS1/styles.css has no content.Ant, Simon. "MSTD - Caves and Wrecks technically explored !". web.infinito.it. Retrieved 2018-08-24.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Page Module:Citation/CS1/styles.css has no content."VOLCANICALLY INFLUENCED SPELEOGENESIS: FORMING EL SISTEMA ZACATÓN, MEXICO AND POZZO MERRO, ITALY, THE DEEPEST PHREATIC SINKHOLES IN THE WORLD". gsa.confex.com. Retrieved 2018-08-24.
- ^ Page Module:Citation/CS1/styles.css has no content.Caramannaa, Giorgio; Argentieri, Alessio; Buonfigliob, Vincenzo (2022). "Il sinkhole allagato del "Pozzo del Merro": 20 anni di esplorazione e studio". www.acquesotterranee.net. Acque Sotterranee - Italian Journal of Groundwater. pp. 73–78. Retrieved 2025-04-03.
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